Aluminum alloy and method of producing the same.



UNITED STATES {PATENT QEFFTCE. 1

WILLIAM A. MOADAMS, OF BAY SHORE, NEW YORK.

ALUMINUM ALLOY AND METHOD OF P QDU ING-THE SAME.

No Drawing.

To all whom it may concern:

Be it known that T, VILLIAM AMoAnAtis, a citizen of the United States, and resident of Bay Shore, in the county of Suffolk and State of New York, have invented a new and useful Improvement in Aluminum -Alloys and Methods of Producing the Same, of which the following isa specification.

My invention consists in an aluminum alloy and in the method of producing the same, thesaid alloy comprising a novel com- -bination of materials in novel proportions,

producing a composition of matter especially 'well adapted for casting under pressure in die-casting machines,'said composition being very strong and. resonant and having a permanent superior luster.

The alloyis composed ofaluniinum, Zinc, copper and antimony combined in substantially the following proportions by weight:

aluminum seventy parts, zinc twenty-two parts, copper three parts, and antimony five parts. i

In producingthe alloy, the method which I have found to be the best is as follows. About one third oi the aluminum is melted and raised to a high temperature. The copper is then introduced into the aluminum and then the balance of the aluminum'is introduced into the mass. The temperature of the mass is then lowered and the zinc and then the antimony introduced, the mass being agitated thoroughly to insure the proper mixing of the difierent metals. The composition will then be ready for casting.

The introduction of the antimony into the mass is for'the purpose of overcoming the Specification of Letters Iatent.

Patented May 1914.

Application filed October 2,1913. Serial No. 292,983.

shrinkage of the mass when cooling, the iiicrease in volume of the antimony as it cools, counteracting the contraction of the other metals as they cool.

The alloy composed of the above materials combined in the proportions substantially as above set forth, will produce a very satisfactory casting metal, especially well adaptedfor use in connection with die-casting ma- Y copper and antimony, consisting in melting a portion of the aluminum and raising it to a high temperature, then introducing the copper, then the balance of the aluminum,

then lowering the temperature of the mass and introducing the zinc andantimony and thoroughly agitating the mass.

In testimony, that I claim the foregoing as my invention, I have signed my name in ipresenceof two Witnesses, this first day of October, 1913.

- WILLIAM A. MCADAMS.-

/Vitnesses: 4 I r F. GEORGE BARRY, :qEh'RY C. TiiinME. 

